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    "python之numpy的基本使用"
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   "source": [
    "一、numpy概述"
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    "numpy（Numerical Python）提供了python对多维数组对象的支持：ndarray，具有矢量运算能力，快速、节省空间。numpy支持高级大量的维度数组与矩阵运算，此外也针对数组运算提供大量的数学函数库。"
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    "二、创建ndarray数组"
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    "ndarray：N维数组对象（矩阵），所有元素必须是相同类型。\n",
    "ndarray属性：ndim属性，表示维度个数；shape属性，表示各维度大小；dtype属性，表示数据类型。\n",
    "\n",
    "----------\n",
    "创建ndarray数组函数：\n"
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